x86: Force !in_irq() in machine_restart().

Various function we may call assert this fact. We just want to restart
the system.

Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/xen/arch/x86/shutdown.c b/xen/arch/x86/shutdown.c
index 15f5988af7..6466df4ee8 100644
--- a/xen/arch/x86/shutdown.c
+++ b/xen/arch/x86/shutdown.c
@@ -316,6 +316,13 @@ void machine_restart(unsigned int delay_millisecs)
             halt();
     }
 
+    /*
+     * We may be called from an interrupt context, and various functions we
+     * may need to call (alloc_domheap_pages, map_domain_page, ...) assert that
+     * they are not called from interrupt context. This hack keeps them happy.
+     */
+    local_irq_count(0) = 0;
+
     smp_send_stop();
 
     mdelay(delay_millisecs);